Premium
Long‐wavelength optical phonons in Mn x Hg 1− x Te mixed crystals
Author(s) -
Gȩbicki W.,
Nazarewicz W.
Publication year - 1977
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220800136
Subject(s) - phonon , wavelength , reflection (computer programming) , kramers–kronig relations , spectral line , optics , condensed matter physics , physics , materials science , refractive index , quantum mechanics , computer science , programming language
The infrared reflection spectra of Mn x Hg 1– x Te with 0 ≦ x ≦ 0.69 are measured in the optical region from 50 to 300 cm +1 at 90 and 295 K. Long‐wavelength optical phonon frequencies are obtained by means of the Kramers‐Kronig relations. The behaviour of the phonon spectra is classified as a “two‐mode type behaviour”. The random‐element isodisplacement (REI) model is applied to calculate numerically the long‐wavelength optical phonon frequencies in the mixed crystals as a function of composition. The theoretical results are in good agreement with those obtained experimentally.